Bicycle



FIG. 1 is a front perspective view of a bicycle of the present design ina neutral position;

FIG. 2 is a side view of the bicycle of FIG. 1 in the neutral position;

FIG. 3 is a side view of the bicycle of FIG. 1 in a lowered position;

FIG. 4 is a side view of the bicycle of FIG. 1 in a raised position;and,

FIG. 5 is a bottom plan view of the bicycle of FIG. 1.

CLAIM The ornamental design for a bicycle, as shown and described.